The snap-server package

Snap is a simple and fast web development framework and server written in
Haskell. For more information or to download the latest version, you can
visit the Snap project website at http://snapframework.com/.

The Snap HTTP server is a high performance, epoll-enabled, iteratee-based web
server library written in Haskell. Together with the snap-core library upon
which it depends, it provides a clean and efficient Haskell programming
interface to the HTTP protocol.

Higher-level facilities for building web applications (like user/session
management, component interfaces, data modeling, etc.) are planned but not
yet implemented, so this release will mostly be of interest for those who:

need a fast and minimal HTTP API at roughly the same level of abstraction
as Java servlets, or